Page 30 - modul trigonometri bilingual
P. 30
Example 2.1
Known = < and coordinates point T(-6,2). Specify the value
cos csc .
Alternative Solutions
r = OT
2
2
= √ +
2
2
= √6 + 2
= √36 + 4
= √40
= 2√10
cos =
=
−6 √10
= ×
2√10 √10
−6 3
= √10 = − √10
20 10
cos =
=
2√10
=
2
= √10
3
cos csc = − √10 × √10 = −3
10
So, the value cos csc is -3
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